Nut-lock.



E. L. BARRY.

' NUT LOOK.

APPLICATION FILED JULY 1,1911.

1,010,343, Patented Nov. 28, 1911.

Wa'fawses:

, a'subject of His Majesty the King of Eng- UNITED STATES PATENT OFFICE.

nnwYN LAKE BARRY, orrULnAr/r, Lennon, ENGLAND.

NUT-LOCK.

To all whom 'it may concern: I

Be it known that I, EDWYN LAKE BARRY,

land, residing at 357 North End road, Fulham, in the count-y of London, Kingdom of England, have invented a certain new and useful Improved Nut-Lock, of which the follpwing is a specification.

This invention relates to improvements in nut locks of the class in which a screw threaded split bushon the bolt, ha'ving a conical'outer surface, engages a conical recess in the base of a'nut and is contracted thereby to grip the bolt as the nut is screwed up.

My invention consists in forming the split bush and recess in'the nut with curvedsurfaces and in other improvements hereinafter described. I

One object of my invention, is to construct a nut lock consisting of two parts or ele ments in which that part which bears on the work shall be locked upon the bolt by the other portion in such a manner, that it is held stationary in that position, and is thu's unaffected by any turning movement, on the part of the bolt, or of the work held between the head of the bolt, and the nut lock, which movement causes a nutto slacken back in ordinary use.

Another object is that the nut lock shall occupy within a fraction, the space of an ordinary nut, and shall be locked by the pressure of a spanner, applied in theiordinary way, and similarly released.

Figure 1 is a sectional elevation of the improved nut lock; Fig. 2 is a similar view showing the parts before tightening the nut; Fig. 3 is a plan view; Fig. 4 shows in sectional elevation a slightly modified arrangement. Fig. 5 shows the invention applied to an axle or shaft fitted with ball bearings; and Fig. 6 is a plan view thereof.

As shown in the accompanying drawings the collar 0 is internally threaded, radially coned and also'slotted in one place as shown in Figs. 1, 2, 4- and 5. The slot is slightly opened, as shown at f Fig. 2, so as to be a slack fit upon bolt a. The collar 0 is approximately one third the height of the nut 12. It is necessary to make the collar 0 in rightproportions to the recessed nut Z), for it the collar 0 is made too large, the nut would be weakened and the lock would be ineffective, on the other hand if the collar- Specification of Letters Patent. Patented Nov, 28, 1911. Application filed July 1, 1911. Serial 110,638,333;

and would not resume its original position when released.

I The collar 0 being in one unit and slotted 1n one place, is capable of being compressed and will resume its original position, when released, as shown in Fig. 2 at f. The collar 0 is internally screwed, so as to engage a portion of the threaded bolt (1, as shown,

- The internally threaded portion of the collar 0, and the externally threaded portion of the bolt 0;, shown in Fig.1 at is, isthe area of lock. The collar 0 is radially coned as shown and the base of the same is brought as near the flats of the nut b as possible, as shown in Figs. 1 "and 2, so as to give the utmost possible strength to the collar 0 in the above stated space.- Also the shape of the cone ofeollarc being radial, greater latitude of lock is-obt-ained, as shown "at h, Figs. 1 and 4, thanif the cone; was straight. collar 0 is left flat, thus a space Z is' left between its top and the top or recessed portion of nut b, when the said nut is screwed down, and fully locked, this being shown at Z Figs. 1, 2 and 4 for the reason, if this coned part of the collar 0 came into contact with the recessed nut b at this point, and there occurred any movement of the said collar 0 through reasons stated above, the recessed nut would slacken back. .But as the space Z Fig. 1, is provided, should the collar 0 move, it will be more firmly pressed upon the threaded portion of the bolt 0, it engages, and at the same time it will force the recessed nut 12 against thethreaded portion of the bolt a, which it engages instead of slackening the same.

The nut 6, Figs. 1 and 2 is radially recessed at the bottom, and is made, so that it engages the collar 0, as low down as possible as at 9, Fig. with the work d, Figs. 1 and 2, when fully locked. The shape of the recessed portion of nut b is such, that when the recessed nut b has fullylocked the collar 6 upon the work (i, that it has full surface contact, as at 3' in the drawings.

The collar 0 Figs. 1, 2, 4 and 5 is first screwed down the bolt (1, upon the plates or work d. The recessed nut is then screwed on coming into contact with the collar 0 at.

2, without coming into contact The top 'of'the coned 7, Fig. 2; the cone of the collar 0 and the recessed portion of nut beingso shaped that the whole pressure of the descending nut b is diverted horizontally towa d the portion of the threaded bolt (1 it engages, as shown at is Figs. 1 and 5. No lock thus occurs before the collar c bases on the work d. The nut 1) holds the collar 0 as shown in Figs. 1, 4, and 5 in this posi-' tioin and thus prevents the collar 0 slackening back, until the nut 7) is released.

The recessed portion of the nut b can be inade separate from the nut b shown at e I igs. t and 5, and can be used in conjunction with an ordii'iary nut b, Fig. 4C or with a check nut 71 as shown in Fig. 5. This lock can be applied to locking ball hearings on axles as also shown in Fig. 5. a p What I cl aini as my invention and desire to secure by Letters Patent of the United States is:- i

l. The combination of a bolt, a ,split col.- lar having screw-threaded engagement with said bolt and provided with a curved outer surface, and a nut adapted to screw on said bolt and provided with a. recess for the re ception of said split collar so that the split collar may be compressed circunit'erentially on the bolt to lock the collarto the bolt, the

nut in locked position shielding substantially all of the collar in its recess.

2. The combination ofa bolt, a split colby lock the collar to the bolt the Hat portion of the outer side of the collar being adapted to provide a recess between the outer side of the collar and the bottom of the recess of the nut so that upon any movement of the collar the nut will effect a iirni locking of the collar on the bolt.

In testimony whereof I have hereunto set my hand in presence of two subr'scribing witnesses this twentyiirst day of June 1911.

ED /VlHI LAKE BARR-Y.

\Vitnesses J. S. -Wrrmnas, L. BLAKEY. 

